Make sure you have pigpio installed and running.
You might find some inspiration here https://github.com/marcobergman/seatalk_convert, if only for the electrical hints, as I am a bit weary of many of the interfaces I see recommended. Don't understand why you have 2 opto-couplers, as you can tie seatalk-1 lines together?
On one hand, this python script can read seatalk from any GPIO and makes NMEA sentences from it. I built this because I have no signalk on the raspberry that my seatalk instruments are connected to. It does not do depths (I have depth from a nmea0183 source) but if you send me your example seatalk datagrams I'll see what I can do.
On the other hand, the SignalK interface does indeed seem to have the depth datagram (00) already implemented. As for the autohelm datagrams, you have to be more specific.
Cheers, -
You might find some inspiration here https://github.com/marcobergman/seatalk_convert, if only for the electrical hints, as I am a bit weary of many of the interfaces I see recommended. Don't understand why you have 2 opto-couplers, as you can tie seatalk-1 lines together?
On one hand, this python script can read seatalk from any GPIO and makes NMEA sentences from it. I built this because I have no signalk on the raspberry that my seatalk instruments are connected to. It does not do depths (I have depth from a nmea0183 source) but if you send me your example seatalk datagrams I'll see what I can do.
On the other hand, the SignalK interface does indeed seem to have the depth datagram (00) already implemented. As for the autohelm datagrams, you have to be more specific.
Cheers, -